Isiphumo sokusetyenziswa kwe-calcium chloride ukulawula ukuxinana kodaka
Ngenxa yotshintsho lwezinye izinto, umgangatho we-sludge esebenzayo uba lula, wande, kwaye ukusebenza kokuzinza kuyawohloka, ixabiso le-SVI liyaqhubeka linyuka, kwaye ukwahlulwa okuqhelekileyo kwamanzi odaka akunakuqhutywa kwi-sedimentation tank yesibini. Inqanaba le-sludge ye-sedimentation tank yesibini liyaqhubeka linyuka, kwaye ekugqibeleni i-sludge iyalahleka, kwaye uxinzelelo lwe-MLSS kwi-aeration tank luyancipha kakhulu, ngaloo ndlela lutshabalalisa i-sludge kwinkqubo eqhelekileyo yokusebenza. Le meko ibizwa ngokuba yi-sludge bulking. I-sludge bulking yinto eqhelekileyo engaqhelekanga kwinkqubo ye-sludge esebenzayo.
Inkqubo yodaka olusebenzayo ngoku isetyenziswa kakhulu ekucoceni amanzi amdaka. Le ndlela ifumene iziphumo ezilungileyo ekuphatheni iintlobo ezininzi zamanzi amdaka endalo afana nelindle likamasipala, ukwenza amaphepha kunye nokufaka idayi emanzini amdaka, ukubonelela ngamanzi amdaka kunye namanzi amdaka ekhemikhali. Nangona kunjalo, kukho ingxaki eqhelekileyo ekuphatheni i-lindle olusebenzayo, oko kukuthi, i-lidge kulula ukuyidumba ngexesha lokusebenza. I-sludge bulging yahlulwe ngokubanzi kwi-filamentous type bacterial sludge bulging kunye ne-non-filamentous type sludge bulging, kwaye kukho izizathu ezininzi zokwakheka kwayo. Umonakalo we-sludge bulging unzima kakhulu, xa sele usenzeka, kunzima ukuwulawula, kwaye ixesha lokubuyisela lide. Ukuba amanyathelo okulawula awathathwanga ngexesha, ukulahleka kwe-sludge kunokwenzeka, okonakalisa ngokusisiseko ukusebenza kwetanki yomoya, okubangela ukuba yonke inkqubo yonyango iwele.
Ukongeza i-calcium chloride kunokuthintela ukukhula kwebhaktiriya ene-filamentous, nto leyo enceda ekwakhiweni kwee-bacterial micelles, kwaye kuphucule ukusebenza kokuzinza kwe-sludge. I-calcium chloride iya kubola ize ivelise ii-ion ze-chloride emva kokuba inyibilikisiwe emanzini. Ii-ion ze-chloride zinefuthe lokubulala iintsholongwane kunye nokubulala iintsholongwane emanzini, nto leyo enokubulala inxalenye yebhaktiriya ene-filamentous kwaye ithintele ukudumba kwe-sludge okubangelwa yi-bacteria ene-filamentous. Emva kokuyeka ukongezwa kwe-chlorine, ii-ion ze-chloride nazo zinokuhlala emanzini ixesha elide, kwaye iibhaktiriya ezine-filamentous azikhuli kakhulu kwixesha elifutshane, kwaye ii-microorganisms zisenokwenza i-dense regular floc, nto leyo ebonisa ukuba ukongezwa kwe-calcium chloride kunokuthintela ukukhula kwebhaktiriya ene-filamentous kwaye kunefuthe elihle ekusombululeni ukudumba kwe-sludge.
Ukongeza i-calcium chloride kunokulawula ukudumba kodaka ngokukhawuleza nangendlela efanelekileyo, kwaye i-SVI yodaka olusebenzayo inokunciphisa ngokukhawuleza. I-SVI yehle ukusuka kwi-309.5mL/g ukuya kwi-67.1mL/g emva kokongeza i-calcium chloride. Ngaphandle kokongeza i-calcium chloride, i-SVI yodaka olusebenzayo inokunciphisa ngokutshintsha indlela yokusebenza, kodwa izinga lokunciphisa lihamba kancinci. Ukongeza i-calcium chloride akunampembelelo icacileyo kwizinga lokususa i-COD, kwaye izinga lokususa i-COD lokongeza i-calcium chloride liphantsi nge-2% kuphela kunelo lokungafaki i-calcium chloride.